[nina0113]

Native American leaders have challenged him, and he's unable to prove his supposed Cherokee heritage. He has subsequently been denounced by native Americans.

Got link?

[nuconvert]

I don't have a link, but I will paraphrase what I've read and tell you the names of some of the people who have denounced him :
Susan Harjo, President of the Morningstar Institute, has called him a liar. She said in 15yrs of interviews and investigations, he hasn't been able to come up with a single Indian ancestor.
And Vernon Bellecourt, an American Indian Movement activist in Minneapolis, calls him a fraud.
Churchill claims to be a member of the Keetoowah Cherokee, but that tribe has issued "associate membership" cards in the past, and even designated Clinton as a member.